Enneapterygius viridicauda Fricke, Erdmann & Sianipar, 2024
Greentail triplefin

Family:  Tripterygiidae (Triplefin blennies), subfamily: Tripterygiinae
Max. size:  2.31 cm SL (male/unsexed)
Environment:  reef-associated; marine; depth range 1 - 5 m
Distribution:  Western Pacific: Indonesia.
Diagnosis:  Dorsal spines (total): 15-16; Anal soft rays: 19-19. This species included in the Enneapterygius flavoccipitis species complex is distinguished by the following characters: A 19; pectoral fin with 7 median branched rays; lateral-line scales 15-16 +19; mandibular-pore formula 4+1+4; eye diameter 100-119; preorbital 69-72; body depth 211-225; preanal-fin length 489-500. Colouration: preserved male with a black head-mask, posterior half of body dark, third dorsal fin pale (only basally dusky), anal fin plain black, no triangular black blotches above anal-fin base, pelvic fins pale, and caudal fin dark with a narrow pale margin (Ref. 131105).
Biology:  Occurs on shallow waters, in a mixed coral, sponge and algae habitat exposed to waves and surge throughout the year. Its unusual rose and green body coloration is used as a camouflage in this kind of habitat. The body colors blend into the background (Ref. 131105).
IUCN Red List Status: Not Evaluated (N.E.) Ref. (130435)
Threat to humans:  harmless


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